syphon washer gone, easy fix but then I would say that as I am a plumber. Have to remove cistern from pan, undo large nut underneath and remove syphon, turn upside down and you see washer, either round or oblong. Swap washer or swap syphon, neither part is expensive
rawplumb
March 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix toilets.